Merge branch 'fix-Qt-manual-typo' into release
Merge branch 'clang-warnings' into release
Merge branch 'fix_policy_diagnostics' into release
Merge branch 'revise-compiler-id-policies' into release
Merge branch 'Qt4Macros-moc-performance' into release
ExternalProject: Find VCS packages quietly

This keeps the VCS packages out from FeatureSummary output, unless
the INCLUDE_QUIET_PACKAGES is used.
Fix build on AIX failing because of access to string elements

The compilation failed with this error message:

.../Source/cmCryptoHash.cxx: In method `string cmCryptoHash::HashString (const string &)':
.../Source/cmCryptoHash.cxx:41: non-lvalue in unary `&'

This was introduced in 77f60392d93f41a8828d3db1d7b76d45f1535d07 (stringapi:
Accept strings when MD5 hashing data).
RunCMake: Allow specifying the source dir and file to test.

This will allow decoupling the name of the test from the name and
location of the source file under test, which means one source
file can be used for multiple tests.

Rename the PARENT_SCOPE test in RunCMake.set to not use a keyword
of the if() command as a file name.  As the filename is now used
with an if condition, this causes a conflict.
Re-word comment on unreachable return statements

Do not use the word "warning" in the comment because CTest launchers
match it and CTestCustom.cmake.in does not suppress it.
cmSystemTools: Remove unreachable return on HP compiler

Follow up commit 1de08685 (cmSystemTools: Restore unreachable return to
silence warnings, 2014-04-02) by excluding the unreachable return on the
HP compiler as well as Clang.  Both recognize that it is unreachable and
warn.
KWSys 2014-04-07 (8b085635)

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ 8b085635 | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' 39f98b5d..8b085635
Rolf Eike Beer (2):
      a99a9235 set the compile flags for older HP compilers to fix compilation
      8b085635 MD5: avoid casting back and forth between size_t and int

Change-Id: I6386b521dbaba2e4f9ed5b2be34a504b9c17fc36
Merge branch 'upstream-kwsys' into update-kwsys
cmTarget: Short-circuit language computation if context independent.

Computing the language involves computing the source files, which
is an expensive operation.  It requires calling
cmMakefile::GetOrCreateSource many times, which involves creating
and matching on many cmSourceFileLocation objects.

Source files of a target may depend on the head-target and the
config as of commit e6971df6 (cmTarget: Make the source files depend
on the config., 2014-02-13).  The results are cached for each context
as of commit c5b26f3b (cmTarget: Cache the cmSourceFiles in
GetSourceFiles., 2014-04-05).

Each target in the build graph causes language computation of all
of its dependents with itself as the head-target.  This means that
for 'core' libraries on which everything depends, the source files
are computed once for every transitive target-level-dependee and
the result is not cached because the head-target is different. This
was observed in the VTK buildsystem.

Short circuit the computation for targets which have a source-list
that is independent of the head-target.  If the source-list has
already been computed and the generator expression evaluation
reports that it was context-independent, return the only source-list
already cached for the target.  Reset the short-circuit logic when
sources are added and when the link libraries are re-computed.
cmTarget: Add all sources traced from custom commands at once.

The AddSource method accepts one file and tries to avoiding adding
it to the sources-list of the target if it already exists.  This
involves creating many cmSourceFileLocation objects for matching
on existing files, which is an expensive operation.

Avoid the searching algorithm by appending the new sources as one
group.  Generate-time processing of source files will ensure
uniqueness.

Add a new AddTracedSources for this purpose.  The existing
AddSources method must process the input for policy CMP0049, but
as these source filenames come from cmSourceFile::GetFullPath(),
we can forego that extra processing.
Export: Disallow exported interface includes in src/build tree (#14592).

Allow directories in the source tree or build tree only if the
install tree is a subdirectory of the source tree or build tree,
as appropriate.

Re-use the test files in the RunCMake.include_directories test
to run in multiple scenarios.  Bump the required CMake version
in the test to 3.0 to ensure that the new policy warnings are
emitted correctly.
Merge branch 'release'
Merge topic 'optimize-source-file-processing'

4f1c71fd cmTarget: Add all sources traced from custom commands at once.
b1c3ae33 cmTarget: Short-circuit language computation if context independent.
Merge topic 'ExternalProject_VCS-quiet'

2dad1c14 ExternalProject: Find VCS packages quietly
Merge topic 'aix-compile'

539b6c58 Fix build on AIX failing because of access to string elements
Merge topic 'update-kwsys'

f401b925 Merge branch 'upstream-kwsys' into update-kwsys
c54be583 KWSys 2014-04-07 (8b085635)